Hi All,
As MG says the quantity of oil draining down the follower tunnel is small.
My opinion is ,
This drains anyway into the cam trough and some will be thrown back up to the followers via the cam
BSA didnt see the need for this mod and neither do I
The main supply for the cam and followers comes from the pressure relief bypass and I think it can be accepted by all of us that if this supply fails or is reduced drastically the cam and followers fail in short order (no matter how good they are
)
The most common cause of worn cam's / followers is that the main T/S bush is worn or the pump is fkd! (porus)
Also all the oil in the world will not prevent wear on crap pattern parts!!!
End fed crank conversions eliminate the loss of oil pressure at the T/S main and in my opinion (again) therefore increase oil supply to the cam and followers
Cheers
John O R